Add to ORKGPhotograph of an UNIDENTIFED man with horse drawn equipment plowing under Austrian Winter peas as a green manure crop. The back of the photograph proclaims, "Plowing under Austrian Winter Peas as a green manure crop on the Experiment Station farm at Stillwater, Oklahoma.
Photograph of an unknown man using a horse drawn plow. In the image the man is looked at from below ...
Copy print of a black and white photograph of an unidentified man plowing a field with a team of thr...
Photograph of an UNIDENTIFED man with horse drawn equipment mowing a contour ridged pasture for weed...
Photograph of a UNIDENTIFED man plowing down Austrian winter peas and oats to improve soil structure...
Photograph of an UNIDENTIFED man on a tractor plowing down Austrian winter peas and oats to improve ...
Photograph of an UNIDENTIFED farmer plowing under hairy vetch for green manure. The back of the phot...
Photograph of an UNIDENTIFIED man on a tractor plowing an alfalfa crop under for green manure crop. ...
Photograph of a UNIDENTIFED man on a tractor plowing down oats, Austrian peas, and vetch as part of ...
Photograph of an UNIDENTIFIED man on a tractor-plowing vetch under for soil improvement. The back of...
Photograph of an UNIDENTIFED man with horse drawn equipment spreading manure on the contour in terra...
Photograph of an UNIDENTIFIED man on a combine harvesting wheat growing from Pullman soils. The back...
Photograph of an UNIDENTIFIED farmer using an improvised device harrowing contour furrows. The back ...
Photograph of an UNIDENTIFED man harvesting alfalfa hay. The back of the photograph proclaims, "Alfa...
Photograph of (Herb) Nelson standing in a crop/legume rotated field of Austrian winter peas and smal...
Photograph of a UNIDENTIFED man cultivating grain sorghum on the contour with a two row cultivator. ...
Photograph of an unknown man using a horse drawn plow. In the image the man is looked at from below ...
Copy print of a black and white photograph of an unidentified man plowing a field with a team of thr...
Photograph of an UNIDENTIFED man with horse drawn equipment mowing a contour ridged pasture for weed...
Photograph of a UNIDENTIFED man plowing down Austrian winter peas and oats to improve soil structure...
Photograph of an UNIDENTIFED man on a tractor plowing down Austrian winter peas and oats to improve ...
Photograph of an UNIDENTIFED farmer plowing under hairy vetch for green manure. The back of the phot...
Photograph of an UNIDENTIFIED man on a tractor plowing an alfalfa crop under for green manure crop. ...
Photograph of a UNIDENTIFED man on a tractor plowing down oats, Austrian peas, and vetch as part of ...
Photograph of an UNIDENTIFIED man on a tractor-plowing vetch under for soil improvement. The back of...
Photograph of an UNIDENTIFED man with horse drawn equipment spreading manure on the contour in terra...
Photograph of an UNIDENTIFIED man on a combine harvesting wheat growing from Pullman soils. The back...
Photograph of an UNIDENTIFIED farmer using an improvised device harrowing contour furrows. The back ...
Photograph of an UNIDENTIFED man harvesting alfalfa hay. The back of the photograph proclaims, "Alfa...
Photograph of (Herb) Nelson standing in a crop/legume rotated field of Austrian winter peas and smal...
Photograph of a UNIDENTIFED man cultivating grain sorghum on the contour with a two row cultivator. ...
Photograph of an unknown man using a horse drawn plow. In the image the man is looked at from below ...
Copy print of a black and white photograph of an unidentified man plowing a field with a team of thr...
Photograph of an UNIDENTIFED man with horse drawn equipment mowing a contour ridged pasture for weed...